ROARING BACK: Tiger numbers are on the rise for the first time in a century. According to the World Wildlife Fund, the global population of tigers in the wild is up from 3,200 in 2010 to 3,890 in 2016.

MONUMENTAL: On Tuesday, the Sewall-Belmont House & Museum in Washington, D.C. became the United States’ first national monument to women’s history. The house and museum is the former home to one of the nation’s leading women’s rights organizations.

TO INFINITY AND BEYOND: Stephen Hawking and Russian billionaire Yuri Milner announced a plan to send postage stamp-sized probes to the nearest star system, Alpha Centauri.

RADIOACTIVE BOARS: The wild boar population in Fukushima, Japan has thrived since humans evacuated the area after the 2011 nuclear power plant meltdown. Although the boars have caused over $900,000 in damages to surrounding farmland, the animals can't be hunted for food because their meat is contaminated with radioactive material.

ZIKA LINK CONFIRMED: United States health officials confirmed that infection with the Zika virus during pregnancy causes the birth defect microcephaly. Lawmakers are now under pressure to grant requests for emergency funding to fight the virus.